Mean age of the population

Assignment Help Basic Statistics
Reference no: EM1395273

A Study by Thienprasiddhi et al. examined a sample of 16 subjects with open-angle glaucoma and unilateral hemifield defects. The ages (years) of the subjects were:

62 62 68 48 51 60 51 57
57 41 62 50 53 34 62 61

Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05

Reference no: EM1395273

Questions Cloud

Pressure variations and ocean exploration : Pressure Variations and Ocean Exploration, How do the pressure variations with depth affect the ability to explore the ocean? How does it affect scuba diving
Damped forced oscillations : Damped forced oscillations, A single stage vibration isolation system consists of a heavy granite slab (100 kg) sitting on legs which act as a vertical damped spring. The "Q" (Quality Factor) of the system is 8.0, and the velocity damping coeffici..
Probability-sugar packaged by a certain machine : Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
Determination-test for correlation coefficient : What is the relationship between the amount spent per week on food and the size of the family? Do larger families spend more on food?
Mean age of the population : Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let α = .05
Mean systolic blood pressure for population african-american : We wish to know if, on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American men is greater than 140.
Computing coefficient of determination : In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
Statistical concepts clarification : What type of research design is the strongest when I what to adopt a new educational program? Using a pre-test and post-test with control group, the previous method but without the control group.
Drivers in the sample regularly wear a seatbelt : Between 180 and 230 (inclusive) of the drivers in the sample regularly wear a seatbelt? Hint: Use the BINOMDIST function in Excel.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Determining the marginal density

On randomly selected day, let X and Y, respectively, be proportions of time that the drive-in and walk-in facilities are in use. Determine the marginal density of X.

  Market shares of cola products

A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share?

  Descriptive summary measures

What descriptive summary measures would you use to present the data. which measure is the best to use and which is the worse and why?

  Population mean is less than given value

Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?

  Single proportion testing-the p value method

The study does provide sufficient evidence to support the claim that less than 75% of college student spend less than $250 per semester on textbooks.

  Estimation of incidence proportion

Using the data for women, complete an analysis of CHD incidence in women similar to the one completed for men.

  Systolic blood pressure

Suppose that the mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume the variable is normally distributed.

  Test the female students higher than males mean test

At the .01 level of significance, is the mean grade of the female students higher than that of the males?

  Transportation model using minimization method

The Martin Company is in the process of planning for new production facilities and developing a more efficient distribution system design. At present, it has one plant at St.Louis with a capacity of 30000 units.

  Independent t-test with equal variances not assumed

Compute a 95% confidence interval for the mean difference in the percentage of bone loss between two groups.

  Value of z required for rejection

Given the same significance level, a ________ value of  t  will be required to reject the null hypothesis compared to the value of  z  required for rejection.

  Normally distributed with a mean of thermometer

Thermometers are normally distributed with a mean of O Celsius and a standard deviation of 1. OO Celsius, Find the probability that a randomly selected thermometer reads between - 2.23 and - 1.25 and draw a sketch of the region. The probability is..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd